package com.practice.counttime;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity implements View.OnClickListener{

	private EditText inputet;
	private Button getTime,startTime,stopTime;
	private TextView time;
	private int i = 0;
	private Timer timer = null;
	private TimerTask task = null;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initView();
		
	}
	private void initView(){
		inputet =(EditText) findViewById(R.id.inputtime);
		getTime =(Button)findViewById(R.id.gettime);
		startTime =(Button)findViewById(R.id.starttime);
		stopTime = (Button)findViewById(R.id.stoptime);
		time= (TextView)findViewById(R.id.time);
		getTime.setOnClickListener(this);
		startTime.setOnClickListener(this);
		stopTime.setOnClickListener(this);
	}
	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.gettime:
			time.setText(inputet.getText().toString());
			i = Integer.parseInt(inputet.getText().toString());
			break;
			
		case R.id.starttime:
			startTime();
			break;
		case R.id.stoptime:
			stopTime();
			break;
						
		default:
			break;
		}	
	}
	
	private Handler mHandler = new Handler(){
		public void  handleMessage(Message msg){
			time.setText(msg.arg1+"");
			startTime();
		};
	};
	public void startTime(){
		timer = new Timer();
		task =new TimerTask(){

			@Override
			public void run() {
				i--;
				if(i>0){
				Message message = mHandler.obtainMessage();
				message.arg1 = i;
				mHandler.sendMessage(message);
				}
				else
					stopTime();
					
			}
			
		};
		timer.schedule(task,1);
	}
	public void stopTime(){
		timer.cancel();
		
	}
}
